Commitments (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Commitments To Extend Credit [Line Items]
Commitments to extend credit, Variable	$ 328,290	$ 290,564
Commitments to extend credit, Fixed	29,199	30,343
Total commitments to extend credit	357,489	320,907
Standby letters of credit	$ 10,000	$ 10,217
Letters of credit issued expiration time period, maximum	1 year
Minimum [Member]
Commitments To Extend Credit [Line Items]
Fixed rate commitments to extend credit	2.40%
Maximum [Member]
Commitments To Extend Credit [Line Items]
Fixed rate commitments to extend credit	7.25%